BACtrack S30 User Manual

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eyesight will become fuzzy and you may experience double 
vision. Brain activity is slowed. Your judgment, reflexes, and 
coordination are all negatively affected. some vision impairments 
that occur when you have been drinking include:
narrowing of your field of vision
reduction in your depth perception
Decreased ability to see in darkness
Increased sensitivity to glare and a longer time for your 
         eyes to readjust from the glare
some mental (brain) impairment can occur when you have been 
drinking, including:
reduced awareness of danger
Becoming overly confident and reckless
Difficulty in making decisions
reduction in balance
slowed reflexes
Impaired judgment
Variations among individuals and other factors, such as altitude 
and air temperature, affect the degree of intoxication. some 
individuals may become intoxicated at low BaC levels. a low 
BaC on a breath alcohol tester does not mean that a person’s 
reaction times can respond to any emergency encountered. 
Individuals should not drink alcohol and drive or use any 
machinery after consuming alcohol.
How does alcohol affect my driving?
we can’t emphasize enough how dangerous it is for you to  
drink and drive. Your vision and your brain are the most 
important factors in driving safely. If you jeopardize either by 
drinking, and then you drive, you are likely to be involved in  
a serious or fatal collision.
There is no safe way to drive under the influence of 
alcohol. Even one drink can make you unsafe.
From California Department of Motor Vehicles (http://www.dmv.ca.gov)